| Revision of the trilobite genus Sphaerophthalmus |
| HØYBERGET, M. & BRUTON, D. L. | Norwegian Journal of Geology | 2012 |
| Revision of the trilobite genus Sphaerophthalmus and relatives from the Furongian(Cambrian) Alum Shale Formation, Oslo Regon, Norway; Noregian Journal of Geology, Vol.92, pp. 433-450, Trondheim 2012 |
| Sphaerophthalmus postcurrens (WESTERGÅRD, 1944), Seite 445, Abb. Fig. 11 |